C++ Logical Operators

Logical operators in C++ are used to evaluate relationships between conditions. They return a boolean value, which can either be true (1) or false (0). These operators are often combined with comparison operators to build complex decision-making logic.

Logical Operators and Their Functions

Using Logical Operators Example

#include <iostream>
using namespace std;

int main() {
    int bikeSpeed = 120;
    int carSpeed = 150;

    // Logical AND
    if (bikeSpeed > 100 && carSpeed > 140) {
        cout << "Both bike and car are fast.";
    }

    // Logical OR
    if (bikeSpeed > 130 || carSpeed > 140) {
        cout << "\nAt least one vehicle is fast.";
    }

    // Logical NOT
    if (!(bikeSpeed > 130)) {
        cout << "\nThe bike is not exceeding 130 km/h.";
    }

    return 0;
}

#include <iostream>

using namespace std;

​

int main() {

    int bikeSpeed = 120;

    int carSpeed = 150;

​

    // Logical AND

    if (bikeSpeed > 100 && carSpeed > 140) {

        cout << "Both bike and car are fast.";

    }

​

    // Logical OR

    if (bikeSpeed > 130 || carSpeed > 140) {

        cout << "\nAt least one vehicle is fast.";

    }

​

    // Logical NOT

    if (!(bikeSpeed > 130)) {

        cout << "\nThe bike is not exceeding 130 km/h.";

    }

​

    return 0;

}

​

Explanation of the Example

1. Logical AND (&&):
   • The first if statement checks if both bikeSpeed is greater than 100 and carSpeed is greater than 140.
   • If both are true, it prints: “Both bike and car are fast.”
2. Logical OR (||):
   • The second if statement evaluates if either bikeSpeed exceeds 130 or carSpeed exceeds 140.
   • If at least one is true, it prints: “At least one vehicle is fast.”
3. Logical NOT (!):
   • The final if statement reverses the condition. It checks if bikeSpeed is not greater than 130.
   • If true, it prints: “The bike is not exceeding 130 km/h.”